TLC59582 Texas instruments

TLC59582

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TLC59582

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Описание

The TLC59581/82are 48-channel constant-current sink drivers. Each channel has an individually-adjustable, 65536-step, pulse width modulation (PWM) grayscale (GS) brightness control. The TLC59581 can support 32-multiplexing while TLC59582 can support 16-multiplexing. The output channels are divided into three groups. Each group has a 512-step color brightness control (CC). CC adjusts brightness control between colors. The maximum current value of all 48 channels can be set by 8-step global brightness control (BC). BC adjusts brightness deviation between LED drivers. GS, CC and BC data are accessible through a serial interface port. See application note Build High Density, High Refresh Rate, Multiplexing LED Panel with TLC59581, SLVA744. The TLC59581/82 device has one error flag: the LED open detection (LOD), which can be read through a serial interface port. To resolve this caterpillar issue caused by an open LED, the TLC59581/82 device has an enhanced circuit for caterpillar canceling, thermal shut down (TSD) and IREF resistor short protection (ISP), which ensures a higher system reliability. The TLC59581/82 device also has a power-save mode that sets the total current consumption to 0.8 mA (typical) when all outputs are off. The TLC59581/82 device is a good solution to improve display performance of a multiplexing panel for low-grayscale patterns.

48 Constant-Current Sink Output Channels
Sink Current Capability with Max BC/CC data:
- 25 mA at 5 VCC
- 20 mA at 3.3 VCC
Global Brightness Control (BC): 3-Bit (8-Step)
Color Brightness Control (CC) for Each Color
Group: 9-Bit (512-Step), Three Groups
LED Power Supply Voltage Up To 10 V
V_CC = 3.0 V to 5.5 V
Constant Current Accuracy
- Channel-to-Channel = ±1%(Typ), ±3%(Max)
- Device-to-Device = ±1%(Typ), ±2%(Max)
Data Transfer Rate: 25 MHz
Gray Scale Clock: 33 MHz
Pre-Charge FET to Avoid Ghosting Phenomenon
Enhanced Circuit for Caterpillar Cancelling
Low-Grayscale Enhancement
LED Open Detection (LOD)
Thermal Shut Down (TSD)
Operating Temperature: –40°C to 85°C

Features	48CH LED Driver, Error Flag, Fault Detection, LED Open Detection, PWM LED Driver, Pre-Charge FET, SRAM, Thermal shutdown
Analog dimming steps	512
Data transfer rate (typ) (MHz)	25
Ch to ch accuracy (typ) (±%)	1
Rating	Catalog
Operating temperature range (°C)	-40 to 85